package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/**
 * 执行修改操作
 */
public class JDBCDemo3 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");
        Statement statement = connection.createStatement();
        /*
            根据id修改用户的密码
            UPDATE userinfo
            SET password='556677'
            WHERE id=1
         */
        String sql = "UPDATE userinfo " +
                     "SET password='556677' " +
                     "WHERE id=1";
        int num = statement.executeUpdate(sql);
        if(num>0){
            System.out.println("修改成功");
        }else{
            System.out.println("修改失败");
        }
        connection.close();
    }
}
